Year % of total population 1960 49.6088265407345 1961 49.6095099658953 1962 49.6074682834287 1963 49.6064144426224 1964 49.6055333428288 1965 49.6034448358054 1966 49.6022957203554 1967 49.598922794034 1968 49.5926235903605 1969 49.5837653898762 1970 49.573153403753 1971 49.5590414675514 1972 49.5425889737121 1973 49.5238671392157 1974 49.5008615152696 1975 49.478638955376 1976 49.4584026496164 1977 49.4376495578945 1978 49.4165901666298 1979 49.3935052773577 1980 49.3696287035216 1981 49.3467208089907 1982 49.3267592566945 1983 49.3101149574227 1984 49.2957861986201 1985 49.286290798312 1986 49.2809563053572 1987 49.2784159359251 1988 49.2792288572985 1989 49.2824015909839 1990 49.2858660391636 1991 49.292958470046 1992 49.3046717118777 1993 49.319502673874 1994 49.3341516744025 1995 49.3489929796338 1996 49.364108533341 1997 49.3794650453577 1998 49.3950358860704 1999 49.4123522938787 2000 49.4317082829728 2001 49.4490880750224 2002 49.4671478984594 2003 49.4829565512276 2004 49.493000388139 2005 49.503183499552 2006 49.5153964994364 2007 49.5296294228065 2008 49.5449457916595 2009 49.5594822862842 2010 49.5745966067533 2011 49.5889358997535 2012 49.6038803354925 2013 49.6201415547558 2014 49.6359447306356 2015 49.6526292948884 2016 49.6712638848319 2017 49.6888597461796 2018 49.704856480828 2019 49.7199216408627 2020 49.7332739865021 2021 49.7444074721911 2022 49.7514136145948 2023 49.7556130499637